What is the integral of (sqrt(x^2+9))/(x^4) ?

The integral of (sqrt(x^2+9))/(x^4) is -(sqrt(x^2+9))/(3x^3)-(sqrt(9+x^2))/(27x)+C

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integral of (sqrt(x^2+9))/(x^4)

\int \frac{x ^{2} + 9}{x ^{4}} d x

- \frac{x ^{2} + 9}{3 x ^{3}} - \frac{9 + x ^{2}}{27 x} + C

Solution steps

\int \frac{x ^{2} + 9}{x ^{4}} d x

Apply Integration By Parts

= - \frac{x ^{2} + 9}{3 x ^{3}} - \int - \frac{1}{3 x ^{2} x ^{2} + 9} d x

\int - \frac{1}{3 x ^{2} x ^{2} + 9} d x = \frac{9 + x ^{2}}{27 x}

= - \frac{x ^{2} + 9}{3 x ^{3}} - \frac{9 + x ^{2}}{27 x}

Add a constant to the solution

= - \frac{x ^{2} + 9}{3 x ^{3}} - \frac{9 + x ^{2}}{27 x} + C

What is the integral of (sqrt(x^2+9))/(x^4) ?
The integral of (sqrt(x^2+9))/(x^4) is -(sqrt(x^2+9))/(3x^3)-(sqrt(9+x^2))/(27x)+C